Indiana Bat
How far do Indiana bats travel migrate?
Up to 300 miles
How do females roost?
Females form maternity colonies in hollow trees or under loose bark of living or dead standing trees
-Less than 100
How much sun do their roosts need?
Suitable roost trees require a minimum of 7 hours of direct sunlight per day
How do males roost?
Males roost singly or in small groups in hollow trees or under loose bark of living or dead standing trees
What kind of trees do bats need?
Standing dead trees are selected over living trees
Important living tree species for maternity colonies include shagbark hickory and white oak (loose bark)
How big do the trees need to be?
Trees over 20 inches diameter breast height are selected
How many trees do they use?
Maternity colonies typically use 10 – 20 different trees each year
1-3 primary
How much do they eat?
Indiana bats eat up to half their body weight in insects each night
About 0.25 ounces
What is bat hibernation like?
Indiana bats require cool, humid caves and mines with stable temperatures under 50oF but above freezing
Hibernate ~6 months
What are the two size categories of trees needed?
Living trees
Retain >3 trees/acre >20 inches dbh
Retain >6 trees/acre >11 inches dbh
How can you manage habitat for bats?
Retain all living shagbark hickory and white oak trees over 12 inches in diameter for maternity roosts within forest tracts where trees are harvested
Selection cutting
Shelterwood harvesting
When should tree harvest occur?
Tree harvesting should occur between 1 October and 31 March
Where should you not harvest trees?
Avoid harvesting trees within 100 feet of any known hibernaculum
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